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[PATCH OLK-5.10] riscv: process: Fix kernel gp leakage
by Guo Mengqi 04 Jun '24

04 Jun '24

From: Stefan O'Rear <sorear(a)fastmail.com> stable inclusion from stable-v5.10.216 commit 9abc3e6f1116adb7a2d4fbb8ce20c37916976bf5 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9QG6A CVE: CVE-2024-35871 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit d14fa1fcf69db9d070e75f1c4425211fa619dfc8 ] childregs represents the registers which are active for the new thread in user context. For a kernel thread, childregs->gp is never used since the kernel gp is not touched by switch_to. For a user mode helper, the gp value can be observed in user space after execve or possibly by other means. [From the email thread] The /* Kernel thread */ comment is somewhat inaccurate in that it is also used for user_mode_helper threads, which exec a user process, e.g. /sbin/init or when /proc/sys/kernel/core_pattern is a pipe. Such threads do not have PF_KTHREAD set and are valid targets for ptrace etc. even before they exec. childregs is the *user* context during syscall execution and it is observable from userspace in at least five ways: 1. kernel_execve does not currently clear integer registers, so the starting register state for PID 1 and other user processes started by the kernel has sp = user stack, gp = kernel __global_pointer$, all other integer registers zeroed by the memset in the patch comment. This is a bug in its own right, but I'm unwilling to bet that it is the only way to exploit the issue addressed by this patch. 2. ptrace(PTRACE_GETREGSET): you can PTRACE_ATTACH to a user_mode_helper thread before it execs, but ptrace requires SIGSTOP to be delivered which can only happen at user/kernel boundaries. 3. /proc/*/task/*/syscall: this is perfectly happy to read pt_regs for user_mode_helpers before the exec completes, but gp is not one of the registers it returns. 4. PERF_SAMPLE_REGS_USER: LOCKDOWN_PERF normally prevents access to kernel addresses via PERF_SAMPLE_REGS_INTR, but due to this bug kernel addresses are also exposed via PERF_SAMPLE_REGS_USER which is permitted under LOCKDOWN_PERF. I have not attempted to write exploit code. 5. Much of the tracing infrastructure allows access to user registers. I have not attempted to determine which forms of tracing allow access to user registers without already allowing access to kernel registers. Fixes: 7db91e57a0ac ("RISC-V: Task implementation") Cc: stable(a)vger.kernel.org Signed-off-by: Stefan O'Rear <sorear(a)fastmail.com> Reviewed-by: Alexandre Ghiti <alexghiti(a)rivosinc.com> Link: https://lore.kernel.org/r/20240327061258.2370291-1-sorear@fastmail.com Signed-off-by: Palmer Dabbelt <palmer(a)rivosinc.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Conflicts: arch/riscv/kernel/process.c drivers/xen/events/events_base.c [Fix context conflict] Signed-off-by: Guo Mengqi <guomengqi3(a)huawei.com> --- arch/riscv/kernel/process.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c index 7868050ff426..efa86ea707d6 100644 --- a/arch/riscv/kernel/process.c +++ b/arch/riscv/kernel/process.c @@ -22,8 +22,6 @@ #include <asm/switch_to.h> #include <asm/thread_info.h> -register unsigned long gp_in_global __asm__("gp"); - #ifdef CONFIG_STACKPROTECTOR #include <linux/stackprotector.h> unsigned long __stack_chk_guard __read_mostly; @@ -117,7 +115,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg, if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) { /* Kernel thread */ memset(childregs, 0, sizeof(struct pt_regs)); - childregs->gp = gp_in_global; /* Supervisor/Machine, irqs on: */ childregs->status = SR_PP | SR_PIE; -- 2.17.1

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[PATCH OLK-5.10] iommu/arm-smmu-v3: Reducing the CMD_SYNC times
by Zhang Zekun 04 Jun '24

04 Jun '24

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I9G9TI ---------------------------------------- Benifiting from the hardware same address blocking mechanism. We only need to send the CMD_SYNC when creating pte entry other than lvl 3, this can reduce the amounts of CMD_SYNC times sent to avoiding the errata. Detecting the hardware ability by read the SMMU_USER_CONFIG1. Signed-off-by: Zhang Zekun <zhangzekun11(a)huawei.com> --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 57 +++++++++++++++++++-- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 3 ++ drivers/iommu/io-pgtable-arm.c | 4 ++ 3 files changed, 59 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 423a54b7611d..7c818a17ca11 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2309,6 +2309,14 @@ static void arm_smmu_tlb_inv_page_nosync(struct iommu_iotlb_gather *gather, static void arm_smmu_tlb_inv_walk(unsigned long iova, size_t size, size_t granule, void *cookie) { +#ifdef CONFIG_HISILICON_ERRATUM_162100602 + struct arm_smmu_domain *smmu_domain = cookie; + + if (!size && smmu_domain->smmu->options & ARM_SMMU_OPT_SYNC_BATCH) { + arm_smmu_tlb_inv_range_domain(iova, granule, granule, true, cookie); + return; + } +#endif arm_smmu_tlb_inv_range_domain(iova, size, granule, false, cookie); } @@ -2951,6 +2959,9 @@ static void arm_smmu_iotlb_sync_map(struct iommu_domain *domain, if (!(smmu_domain->smmu->options & ARM_SMMU_OPT_SYNC_MAP)) return; + if (smmu_domain->smmu->options & ARM_SMMU_OPT_SYNC_BATCH) + return; + granule_size = 1 << __ffs(smmu_domain->domain.pgsize_bitmap); /* Add a SYNC command to sync io-pgtale to avoid errors in pgtable prefetch*/ @@ -4932,6 +4943,46 @@ static void arm_smmu_get_httu(struct arm_smmu_device *smmu, u32 reg) fw_features); } +#ifdef CONFIG_HISILICON_ERRATUM_162100602 +static void hisi_smmu_check_errata(struct arm_smmu_device *smmu) +{ + u32 reg, i; + + /* IIDR */ + reg = readl_relaxed(smmu->base + ARM_SMMU_IIDR); + if (!(FIELD_GET(IIDR_VARIANT, reg) == 0x3) || + !(FIELD_GET(IIDR_REVISON, reg) == 0x2)) + return; + + smmu->options |= ARM_SMMU_OPT_SYNC_MAP; + + reg = readl_relaxed(smmu->base + ARM_SMMU_USER_CFG1); + reg = reg & GENMASK(15, 0); + for (i = 0; i < 8; i++) { + unsigned long val; + + val = (reg >> 2 * i) & GENMASK(1, 0); + switch (PAGE_SIZE) { + case SZ_4K: + if (!val) + return; + break; + case SZ_16K: + if (!val || val == 0x1) + return; + break; + case SZ_64K: + if (!val || val == 0x1 || val == 0x3) + return; + break; + default: + return; + } + } + smmu->options |= ARM_SMMU_OPT_SYNC_BATCH; +} +#endif + static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu) { u32 reg; @@ -5163,11 +5214,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu) } #ifdef CONFIG_HISILICON_ERRATUM_162100602 - /* IIDR */ - reg = readl_relaxed(smmu->base + ARM_SMMU_IIDR); - if (FIELD_GET(IIDR_VARIANT, reg) == 0x3 && - FIELD_GET(IIDR_REVISON, reg) == 0x2) - smmu->options |= ARM_SMMU_OPT_SYNC_MAP; + hisi_smmu_check_errata(smmu); #endif if (arm_smmu_ops.pgsize_bitmap == -1UL) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h index 776d326de105..ece2904fd728 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h @@ -175,6 +175,8 @@ #define ARM_SMMU_USER_CFG0 0xe00 #define ARM_SMMU_USER_MPAM_EN (1UL << 30) +#define ARM_SMMU_USER_CFG1 0xe04 + #define ARM_SMMU_IDR6 0x190 #define IDR6_LOG2NUMP GENMASK(27, 24) #define IDR6_LOG2NUMQ GENMASK(19, 16) @@ -717,6 +719,7 @@ struct arm_smmu_device { #define ARM_SMMU_OPT_PAGE0_REGS_ONLY (1 << 1) #define ARM_SMMU_OPT_MSIPOLL (1 << 2) #define ARM_SMMU_OPT_SYNC_MAP (1 << 3) +#define ARM_SMMU_OPT_SYNC_BATCH (1 << 4) u32 options; union { diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index 3fc6ae00dc96..dc80f2661ff7 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -364,6 +364,10 @@ static int __arm_lpae_map(struct arm_lpae_io_pgtable *data, unsigned long iova, pte = arm_lpae_install_table(cptep, ptep, 0, data); if (pte) __arm_lpae_free_pages(cptep, tblsz, cfg); +#ifdef CONFIG_HISILICON_ERRATUM_162100602 + if (lvl <= 2) + io_pgtable_tlb_flush_walk(&data->iop, iova, 0, ARM_LPAE_GRANULE(data)); +#endif } else if (!cfg->coherent_walk && !(pte & ARM_LPAE_PTE_SW_SYNC)) { __arm_lpae_sync_pte(ptep, cfg); } -- 2.17.1

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[PATCH OLK-5.10] iommu/iova: move depot up to avoid cache conflict
by Zhang Zekun 04 Jun '24

04 Jun '24

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I9TIC6 ------------------------------------------ The first four params in struct iova_rcache will share the same cache line. The depot related parameter which will be upated each time the depot has been changed, and it should not influence the field "cpu_rcache". Moving the delayed_work up to avoid cache false-sharing, because it has 192 Bytes, which should be enough for sperating a cache line. The optimization can be reflected by perf top: Before: 31.13% [kernel] [k] queue_iova 23.02% [kernel] [k] __iova_rcache_get 7.78% [kernel] [k] __arm_lpae_unmap 6.18% [kernel] [k] arm_lpae_map 3.91% [kernel] [k] sch_direct_xmit 3.19% [kernel] [k] __arm_lpae_map 1.50% [kernel] [k] __dev_queue_xmit After: 15.88% [kernel] [k] __arm_lpae_unmap 11.33% [kernel] [k] arm_lpae_map 7.98% [kernel] [k] sch_direct_xmit 6.71% [kernel] [k] __arm_lpae_map 5.35% [kernel] [k] queue_iova 3.09% [kernel] [k] __dev_queue_xmit 2.83% [kernel] [k] ip_finish_output2 Signed-off-by: Zhang Zekun <zhangzekun11(a)huawei.com> --- include/linux/iova.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/iova.h b/include/linux/iova.h index ccc59e4b6c54..32996e73ce19 100644 --- a/include/linux/iova.h +++ b/include/linux/iova.h @@ -31,9 +31,9 @@ struct iova_rcache { spinlock_t lock; unsigned int depot_size; struct iova_magazine *depot; + struct delayed_work work; struct iova_cpu_rcache __percpu *cpu_rcaches; struct iova_domain *iovad; - struct delayed_work work; KABI_RESERVE(1) KABI_RESERVE(2) }; -- 2.17.1

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[PATCH openEuler-22.03-LTS-SP1] gpiolib: cdev: fix uninitialised kfifo
by Luo Gengkun 04 Jun '24

04 Jun '24

From: Kent Gibson <warthog618(a)gmail.com> mainline inclusion from mainline-v6.9 commit ee0166b637a5e376118e9659e5b4148080f1d27e category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9U7YV CVE: CVE-2024-36898 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- If a line is requested with debounce, and that results in debouncing in software, and the line is subsequently reconfigured to enable edge detection then the allocation of the kfifo to contain edge events is overlooked. This results in events being written to and read from an uninitialised kfifo. Read events are returned to userspace. Initialise the kfifo in the case where the software debounce is already active. Fixes: 65cff7046406 ("gpiolib: cdev: support setting debounce") Signed-off-by: Kent Gibson <warthog618(a)gmail.com> Link: https://lore.kernel.org/r/20240510065342.36191-1-warthog618@gmail.com Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski(a)linaro.org> Conflicts: drivers/gpio/gpiolib-cdev.c [The original patch defines eflags instead of errflags, but eflags is already a parameter of the function, so rename to errflags.] Signed-off-by: Luo Gengkun <luogengkun2(a)huawei.com> --- drivers/gpio/gpiolib-cdev.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c index 381cfa26a4a1..0f98a07efcd6 100644 --- a/drivers/gpio/gpiolib-cdev.c +++ b/drivers/gpio/gpiolib-cdev.c @@ -816,6 +816,8 @@ static int edge_detector_update(struct line *line, unsigned int line_idx, u64 eflags, bool polarity_change) { + u64 errflags; + int ret; unsigned int debounce_period_us = gpio_v2_line_config_debounce_period(lc, line_idx); @@ -827,6 +829,18 @@ static int edge_detector_update(struct line *line, if (debounce_period_us && READ_ONCE(line->sw_debounced)) { line->eflags = eflags; WRITE_ONCE(line->desc->debounce_period_us, debounce_period_us); + /* + * ensure event fifo is initialised if edge detection + * is now enabled. + */ + errflags = eflags & GPIO_V2_LINE_EDGE_FLAGS; + if (errflags && !kfifo_initialized(&line->req->events)) { + ret = kfifo_alloc(&line->req->events, + line->req->event_buffer_size, + GFP_KERNEL); + if (ret) + return ret; + } return 0; } -- 2.34.1

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[PATCH OLK-5.10 v5 00/11] Memory access profiler(SPE) driven NUMA balancing
by Ze Zuo 04 Jun '24

04 Jun '24

Hi, In Arm processors, there is a hardware PMU (Performance Monitoring Unit) facility called Statistical Profiling Extension (SPE) that can gather memory access metrics. In this patchset, SPE is exploited as an access information sampling approach to drive NUMA balancing. This sampling approach is introducedto replace the method based on address space scanning and hint faults with the access information provided by the hardware. With this, it is no longer necessary for NUMA balancing to scan over the address space periodically and rely on task-to-page association built by NUMA hint faults. Instead, the access samples obtained from hardware PMU are fed to NUMA balancing as equivalents to page fault. Except for the replaced sampling approach, the rest of the NUMA balancing policy is retained to do pages and tasks migrations according to the samples. Profiling based on SPE is an valid alternative sampling approach in NUMA balancing for the optimal page and task placement. This can be also extended to other architectures as long as there is a hardware PMU that supports memory access profiling. An abstract layer mem_sampling is introduced to reserve support for other kernel features and different types of hardware PMU. To help evaluate performance of this approach in system, syctl interfaces are added to enable/disable hardware mem sampling. NUMA balancing sampling approach can be also switched back to hint-faults- based approach dynamically. TODOs Currently, SPE for NUMA balance does not support PMD-level page migration, but it will be supported in later version. Changes since v4: -- some patch check warning fixs, no functional change. Changes since v3: -- some clean code, no functional change. Changes since v2: -- clean code and commit fixs, no functional change. Changes since v1: -- clean code, no functional change. Ze Zuo (11): drivers/arm/spe: In-kernel SPE driver for page access profiling mm: Add PMU based memory sampling abstract layer mm/mem_sampling.c: Add controlling interface for mem_sampling sched: Enable per-process mem_sampling from sched switch path mm/mem_sampling.c: Drive NUMA balancing via mem_sampling access data mm/mem_sampling.c: Add controlling interface for mem_sampling on numa balance tracing, numa balance: add trace events for numa data caused by mem_sampling driver/arm/spe: make mem_sampling and perf reuse arm spe driver tracing, mem-sampling-sample: Adding tracking events to hardware-sampled page access samples/bpf: Add program for memory access by spe config: Enable memory sampling based pmu for numa balance by default arch/arm64/configs/openeuler_defconfig | 3 + drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/arm/Kconfig | 2 + drivers/arm/spe/Kconfig | 11 + drivers/arm/spe/Makefile | 2 + drivers/arm/spe/spe-decoder/Makefile | 2 + drivers/arm/spe/spe-decoder/arm-spe-decoder.c | 213 +++++ drivers/arm/spe/spe-decoder/arm-spe-decoder.h | 74 ++ .../arm/spe/spe-decoder/arm-spe-pkt-decoder.c | 227 +++++ .../arm/spe/spe-decoder/arm-spe-pkt-decoder.h | 153 ++++ drivers/arm/spe/spe.c | 854 ++++++++++++++++++ drivers/arm/spe/spe.h | 130 +++ drivers/perf/Kconfig | 2 +- drivers/perf/arm_pmu_acpi.c | 30 +- drivers/perf/arm_spe_pmu.c | 371 ++------ include/linux/mem_sampling.h | 109 +++ include/linux/perf/arm_pmu.h | 8 + include/trace/events/kmem.h | 80 ++ kernel/sched/core.c | 2 + kernel/sched/fair.c | 12 + mm/Kconfig | 24 + mm/Makefile | 1 + mm/mem_sampling.c | 514 +++++++++++ samples/bpf/spe/Makefile | 26 + samples/bpf/spe/Makefile.arch | 47 + samples/bpf/spe/README.md | 0 samples/bpf/spe/spe-record.bpf.c | 40 + samples/bpf/spe/spe-record.h | 47 + samples/bpf/spe/spe-record.user.c | 116 +++ 30 files changed, 2791 insertions(+), 312 deletions(-) create mode 100644 drivers/arm/Kconfig create mode 100644 drivers/arm/spe/Kconfig create mode 100644 drivers/arm/spe/Makefile create mode 100644 drivers/arm/spe/spe-decoder/Makefile create mode 100644 drivers/arm/spe/spe-decoder/arm-spe-decoder.c create mode 100644 drivers/arm/spe/spe-decoder/arm-spe-decoder.h create mode 100644 drivers/arm/spe/spe-decoder/arm-spe-pkt-decoder.c create mode 100644 drivers/arm/spe/spe-decoder/arm-spe-pkt-decoder.h create mode 100644 drivers/arm/spe/spe.c create mode 100644 drivers/arm/spe/spe.h create mode 100644 include/linux/mem_sampling.h create mode 100644 mm/mem_sampling.c create mode 100644 samples/bpf/spe/Makefile create mode 100644 samples/bpf/spe/Makefile.arch create mode 100644 samples/bpf/spe/README.md create mode 100644 samples/bpf/spe/spe-record.bpf.c create mode 100644 samples/bpf/spe/spe-record.h create mode 100644 samples/bpf/spe/spe-record.user.c -- 2.33.0

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[PATCH V3 OLK-5.10 0/2] Fix soft lockup in stress test
by Zhang Zekun 04 Jun '24

04 Jun '24

speed up the speed of freeing iova and add a cond_resched(). v3: Fix check format warning. v2: add a cover letter to generate a pr. Zhang Zekun (2): iommu/iova: free iovas on each cpu in flush queue iommu/iova: Try to schedule out when free iova too long drivers/iommu/iova.c | 41 +++++++++++++++++++++++++---------------- 1 file changed, 25 insertions(+), 16 deletions(-) -- 2.17.1

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[openeuler:openEuler-1.0-LTS] BUILD REGRESSION 6908dfcea35ff8f01855776fcaae9d426a27b44a
by kernel test robot 04 Jun '24

04 Jun '24

tree/branch: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS branch HEAD: 6908dfcea35ff8f01855776fcaae9d426a27b44a !8296 atm: iphase: fix possible use-after-free in ia_module_exit() Error/Warning ids grouped by kconfigs: gcc_recent_errors |-- arm64-allmodconfig | `-- drivers-gpu-drm-nouveau-nvkm-core-object.c:warning:ISO-C90-forbids-mixed-declarations-and-code |-- arm64-defconfig | `-- drivers-gpu-drm-nouveau-nvkm-core-object.c:warning:ISO-C90-forbids-mixed-declarations-and-code |-- arm64-randconfig-001-20240603 | `-- drivers-gpu-drm-nouveau-nvkm-core-object.c:warning:ISO-C90-forbids-mixed-declarations-and-code |-- x86_64-buildonly-randconfig-001-20240603 | `-- drivers-misc-uacce-.tmp_uacce.o:warning:objtool:missing-symbol-for-section-.init.text |-- x86_64-buildonly-randconfig-006-20240603 | `-- fs-f2fs-recovery.o:warning:objtool:missing-symbol-for-section-.init.text |-- x86_64-randconfig-006-20240603 | `-- drivers-gpu-drm-nouveau-nvkm-core-object.c:warning:ISO-C90-forbids-mixed-declarations-and-code `-- x86_64-randconfig-014-20240603 `-- drivers-gpu-drm-nouveau-nvkm-core-object.c:warning:ISO-C90-forbids-mixed-declarations-and-code clang_recent_errors |-- x86_64-allyesconfig | |-- drivers-gpu-drm-nouveau-nvkm-core-object.c:warning:mixing-declarations-and-code-is-a-C99-extension | `-- fs-f2fs-.tmp_recovery.o:warning:objtool:missing-symbol-for-section-.init.text |-- x86_64-buildonly-randconfig-001-20240604 | `-- fs-f2fs-recovery.o:warning:objtool:missing-symbol-for-section-.init.text |-- x86_64-buildonly-randconfig-002-20240604 | `-- fs-f2fs-recovery.o:warning:objtool:missing-symbol-for-section-.init.text |-- x86_64-buildonly-randconfig-004-20240603 | `-- fs-f2fs-.tmp_recovery.o:warning:objtool:missing-symbol-for-section-.init.text |-- x86_64-randconfig-003-20240603 | `-- drivers-gpu-drm-nouveau-nvkm-core-object.c:warning:mixing-declarations-and-code-is-a-C99-extension |-- x86_64-randconfig-073-20240521 | `-- kernel-livepatch-core.c:warning:no-previous-prototype-for-function-klp_check_patch_kprobed `-- x86_64-randconfig-123-20240604 `-- drivers-gpu-drm-nouveau-nvkm-core-object.c:warning:mixing-declarations-and-code-is-a-C99-extension elapsed time: 755m configs tested: 31 configs skipped: 147 tested configs: arm64 allmodconfig gcc arm64 allnoconfig gcc arm64 defconfig gcc arm64 randconfig-001-20240603 gcc arm64 randconfig-002-20240603 gcc arm64 randconfig-004-20240603 gcc x86_64 allnoconfig clang x86_64 allyesconfig clang x86_64 buildonly-randconfig-001-20240603 gcc x86_64 buildonly-randconfig-001-20240604 clang x86_64 buildonly-randconfig-002-20240603 gcc x86_64 buildonly-randconfig-002-20240604 clang x86_64 buildonly-randconfig-003-20240603 gcc x86_64 buildonly-randconfig-004-20240603 clang x86_64 buildonly-randconfig-005-20240603 clang x86_64 buildonly-randconfig-006-20240603 gcc x86_64 defconfig gcc x86_64 randconfig-001-20240603 gcc x86_64 randconfig-002-20240603 clang x86_64 randconfig-003-20240603 clang x86_64 randconfig-004-20240603 gcc x86_64 randconfig-005-20240603 gcc x86_64 randconfig-006-20240603 gcc x86_64 randconfig-011-20240603 gcc x86_64 randconfig-012-20240603 gcc x86_64 randconfig-013-20240603 clang x86_64 randconfig-014-20240603 gcc x86_64 randconfig-015-20240603 gcc x86_64 randconfig-016-20240603 clang x86_64 randconfig-071-20240603 clang x86_64 rhel-8.3-rust clang -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6] BUILD REGRESSION 85fbd1be6338eacc84976df503d1a92c84323ae3
by kernel test robot 04 Jun '24

04 Jun '24

tree/branch: https://gitee.com/openeuler/kernel.git OLK-6.6 branch HEAD: 85fbd1be6338eacc84976df503d1a92c84323ae3 !8435 LoongArch: add GMAC&GNET support Error/Warning ids grouped by kconfigs: gcc_recent_errors |-- arm64-defconfig | |-- arch-arm64-kernel-cpufeature.c:warning:enable_pseudo_nmi-defined-but-not-used | `-- arch-arm64-kvm-vgic-vgic-mmio.c:warning:variable-is_pending-set-but-not-used |-- arm64-randconfig-004-20240603 | `-- arch-arm64-kernel-cpufeature.c:warning:enable_pseudo_nmi-defined-but-not-used |-- loongarch-allnoconfig | `-- drivers-irqchip-irq-loongson-eiointc.c:error:NODES_PER_FLATMODE_NODE-undeclared-(first-use-in-this-function) `-- loongarch-randconfig-002-20240603 `-- drivers-irqchip-irq-loongson-eiointc.c:error:NODES_PER_FLATMODE_NODE-undeclared-(first-use-in-this-function) clang_recent_errors |-- arm64-allmodconfig | `-- arch-arm64-kvm-vgic-vgic-mmio.c:warning:variable-is_pending-set-but-not-used `-- arm64-randconfig-003-20240603 `-- arch-arm64-kernel-cpufeature.c:warning:unused-variable-enable_pseudo_nmi elapsed time: 748m configs tested: 40 configs skipped: 143 tested configs: arm64 allmodconfig clang arm64 allnoconfig gcc arm64 defconfig gcc arm64 randconfig-001-20240603 gcc arm64 randconfig-002-20240603 gcc arm64 randconfig-003-20240603 clang arm64 randconfig-004-20240603 gcc loongarch allmodconfig gcc loongarch allnoconfig gcc loongarch defconfig gcc loongarch randconfig-001-20240603 gcc loongarch randconfig-002-20240603 gcc x86_64 allnoconfig clang x86_64 allyesconfig clang x86_64 buildonly-randconfig-001-20240603 gcc x86_64 buildonly-randconfig-002-20240603 gcc x86_64 buildonly-randconfig-003-20240603 gcc x86_64 buildonly-randconfig-004-20240603 clang x86_64 buildonly-randconfig-005-20240603 clang x86_64 buildonly-randconfig-006-20240603 gcc x86_64 defconfig gcc x86_64 randconfig-001-20240603 gcc x86_64 randconfig-002-20240603 clang x86_64 randconfig-003-20240603 clang x86_64 randconfig-004-20240603 gcc x86_64 randconfig-005-20240603 gcc x86_64 randconfig-006-20240603 gcc x86_64 randconfig-011-20240603 gcc x86_64 randconfig-012-20240603 gcc x86_64 randconfig-013-20240603 clang x86_64 randconfig-014-20240603 gcc x86_64 randconfig-015-20240603 gcc x86_64 randconfig-016-20240603 clang x86_64 randconfig-071-20240603 clang x86_64 randconfig-072-20240603 clang x86_64 randconfig-073-20240603 clang x86_64 randconfig-074-20240603 clang x86_64 randconfig-075-20240603 gcc x86_64 randconfig-076-20240603 gcc x86_64 rhel-8.3-rust clang -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-5.10] BUILD SUCCESS 83e8197dd35ec3fc87c6741759fa0fcd878a4186
by kernel test robot 04 Jun '24

04 Jun '24

tree/branch: https://gitee.com/openeuler/kernel.git OLK-5.10 branch HEAD: 83e8197dd35ec3fc87c6741759fa0fcd878a4186 !8397 mm/hugetlb: fix missing hugetlb_lock for resv uncharge Warning ids grouped by kconfigs: clang_recent_errors |-- arm64-allyesconfig | |-- Documentation-devicetree-bindings-iio-addac-adi-ad74413r.yaml:channel:Missing-additionalProperties-unevaluatedProperties-constraint | `-- Documentation-devicetree-bindings-sound-amlogic-gx-sound-card.yaml:codec(-):Missing-additionalProperties-unevaluatedProperties-constraint `-- x86_64-allnoconfig |-- drivers-net-ethernet-yunsilicon-xsc-net-main.c:common-qp.h-is-included-more-than-once. |-- drivers-ub-urma-ubcore-ubcore_cdev_file.c:linux-version.h-not-needed. |-- drivers-ub-urma-ubcore-ubcore_device.c:linux-version.h-not-needed. |-- drivers-ub-urma-ubcore-ubcore_genl.c:linux-version.h-not-needed. |-- drivers-ub-urma-ubcore-ubcore_genl_admin.c:linux-version.h-not-needed. |-- drivers-ub-urma-ubcore-ubcore_uvs_cmd.c:ubcore_device.h-is-included-more-than-once. `-- drivers-ub-urma-uburma-uburma_mmap.c:linux-version.h-not-needed. elapsed time: 723m configs tested: 35 configs skipped: 148 The following configs have been built successfully. More configs may be tested in the coming days. tested configs: arm64 allmodconfig clang arm64 allnoconfig gcc arm64 defconfig gcc arm64 randconfig-001-20240603 gcc arm64 randconfig-002-20240603 gcc arm64 randconfig-003-20240603 clang arm64 randconfig-004-20240603 gcc x86_64 allnoconfig clang x86_64 allyesconfig clang x86_64 buildonly-randconfig-001-20240603 gcc x86_64 buildonly-randconfig-002-20240603 gcc x86_64 buildonly-randconfig-003-20240603 gcc x86_64 buildonly-randconfig-004-20240603 clang x86_64 buildonly-randconfig-005-20240603 clang x86_64 buildonly-randconfig-006-20240603 gcc x86_64 defconfig gcc x86_64 randconfig-001-20240603 gcc x86_64 randconfig-002-20240603 clang x86_64 randconfig-003-20240603 clang x86_64 randconfig-004-20240603 gcc x86_64 randconfig-005-20240603 gcc x86_64 randconfig-006-20240603 gcc x86_64 randconfig-011-20240603 gcc x86_64 randconfig-012-20240603 gcc x86_64 randconfig-013-20240603 clang x86_64 randconfig-014-20240603 gcc x86_64 randconfig-015-20240603 gcc x86_64 randconfig-016-20240603 clang x86_64 randconfig-071-20240603 clang x86_64 randconfig-072-20240603 clang x86_64 randconfig-073-20240603 clang x86_64 randconfig-074-20240603 clang x86_64 randconfig-075-20240603 gcc x86_64 randconfig-076-20240603 gcc x86_64 rhel-8.3-rust clang -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[PATCH OLK-5.10 v4 00/11] Memory access profiler(SPE) driven NUMA balancing
by Ze Zuo 03 Jun '24

03 Jun '24

Hi, In Arm processors, there is a hardware PMU (Performance Monitoring Unit) facility called Statistical Profiling Extension (SPE) that can gather memory access metrics. In this patchset, SPE is exploited as an access information sampling approach to drive NUMA balancing. This sampling approach is introducedto replace the method based on address space scanning and hint faults with the access information provided by the hardware. With this, it is no longer necessary for NUMA balancing to scan over the address space periodically and rely on task-to-page association built by NUMA hint faults. Instead, the access samples obtained from hardware PMU are fed to NUMA balancing as equivalents to page fault. Except for the replaced sampling approach, the rest of the NUMA balancing policy is retained to do pages and tasks migrations according to the samples. Profiling based on SPE is an valid alternative sampling approach in NUMA balancing for the optimal page and task placement. This can be also extended to other architectures as long as there is a hardware PMU that supports memory access profiling. An abstract layer mem_sampling is introduced to reserve support for other kernel features and different types of hardware PMU. To help evaluate performance of this approach in system, syctl interfaces are added to enable/disable hardware mem sampling. NUMA balancing sampling approach can be also switched back to hint-faults- based approach dynamically. TODOs Currently, SPE for NUMA balance does not support PMD-level page migration, but it will be supported in later version. Changes since v3: -- some clean code, no functional change. Changes since v2: -- clean code and commit fixs, no functional change. Changes since v1: -- clean code, no functional change. Ze Zuo (11): drivers/arm/spe: In-kernel SPE driver for page access profiling mm: Add PMU based memory sampling abstract layer mm/mem_sampling.c: Add controlling interface for mem_sampling sched: Enable per-process mem_sampling from sched switch path mm/mem_sampling.c: Drive NUMA balancing via mem_sampling access data mm/mem_sampling.c: Add controlling interface for mem_sampling on numa balance tracing, numa balance: add trace events for numa data caused by mem_sampling driver/arm/spe: make mem_sampling and perf reuse arm spe driver tracing, mem-sampling-sample: Adding tracking events to hardware-sampled page access samples/bpf: Add program for memory access by spe config: Enable memory sampling based pmu for numa balance by default arch/arm64/configs/openeuler_defconfig | 3 + drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/arm/Kconfig | 2 + drivers/arm/spe/Kconfig | 11 + drivers/arm/spe/Makefile | 2 + drivers/arm/spe/spe-decoder/Makefile | 2 + drivers/arm/spe/spe-decoder/arm-spe-decoder.c | 213 +++++ drivers/arm/spe/spe-decoder/arm-spe-decoder.h | 74 ++ .../arm/spe/spe-decoder/arm-spe-pkt-decoder.c | 227 +++++ .../arm/spe/spe-decoder/arm-spe-pkt-decoder.h | 153 ++++ drivers/arm/spe/spe.c | 854 ++++++++++++++++++ drivers/arm/spe/spe.h | 130 +++ drivers/perf/Kconfig | 2 +- drivers/perf/arm_pmu_acpi.c | 30 +- drivers/perf/arm_spe_pmu.c | 371 ++------ include/linux/mem_sampling.h | 109 +++ include/linux/perf/arm_pmu.h | 8 + include/trace/events/kmem.h | 80 ++ kernel/sched/core.c | 2 + kernel/sched/fair.c | 12 + mm/Kconfig | 24 + mm/Makefile | 1 + mm/mem_sampling.c | 514 +++++++++++ samples/bpf/spe/Makefile | 26 + samples/bpf/spe/Makefile.arch | 47 + samples/bpf/spe/README.md | 0 samples/bpf/spe/spe-record.bpf.c | 40 + samples/bpf/spe/spe-record.h | 47 + samples/bpf/spe/spe-record.user.c | 116 +++ 30 files changed, 2791 insertions(+), 312 deletions(-) create mode 100644 drivers/arm/Kconfig create mode 100644 drivers/arm/spe/Kconfig create mode 100644 drivers/arm/spe/Makefile create mode 100644 drivers/arm/spe/spe-decoder/Makefile create mode 100644 drivers/arm/spe/spe-decoder/arm-spe-decoder.c create mode 100644 drivers/arm/spe/spe-decoder/arm-spe-decoder.h create mode 100644 drivers/arm/spe/spe-decoder/arm-spe-pkt-decoder.c create mode 100644 drivers/arm/spe/spe-decoder/arm-spe-pkt-decoder.h create mode 100644 drivers/arm/spe/spe.c create mode 100644 drivers/arm/spe/spe.h create mode 100644 include/linux/mem_sampling.h create mode 100644 mm/mem_sampling.c create mode 100644 samples/bpf/spe/Makefile create mode 100644 samples/bpf/spe/Makefile.arch create mode 100644 samples/bpf/spe/README.md create mode 100644 samples/bpf/spe/spe-record.bpf.c create mode 100644 samples/bpf/spe/spe-record.h create mode 100644 samples/bpf/spe/spe-record.user.c -- 2.33.0

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